<!-- saved from url=(0014)about:internet --><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN">
<html>
<!-- Standard Head Part -->
<head>
<title>NUnit - PropertyConstraint</title>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<meta http-equiv="Content-Language" content="en-US">
<link rel="stylesheet" type="text/css" href="nunit.css">
<link rel="shortcut icon" href="favicon.ico">
</head>
<!-- End Standard Head Part -->

<body>

<!-- Standard Header for NUnit.org -->
<div id="header">
  <a id="logo" href="http://www.nunit.org"><img src="img/logo.gif" alt="NUnit.org" title="NUnit.org"></a>
  <div id="nav">
    <a href="http://www.nunit.org">NUnit</a>
    <a class="active" href="index.html">Documentation</a>
  </div>
</div>
<!-- End of Header -->

<div id="content">

<h2>Property Constraints (NUnit 2.4.2)</h2>

<p>Property constraints are used to test for the existence of a named property and
optionally to test its value. It may also be used as a prefix for other constraints
to be applied to the property.

<h3>PropertyExistsConstraint</h3>

<h4>Action</h4>

<p>Tests for the existence of a named property on an object.

<h4>Constructor</h4>

<div class="code"><pre>
PropertyExistsConstraint(string name)
</pre></div>

<h4>Syntax</h4>

<div class="code"><pre>
Has.Property( string )
</pre></div>

<h4>Examples of Use</h4>

<div class="code"><pre>
Assert.That( someObject, Has.Property( "Version" ) );
</pre></div>

<h3>PropertyConstraint</h3>

<h4>Action</h4>

<p>Tests for the existence of a named property on an object and causes subsequent
allows tests to be made on the property value.

<h4>Constructor</h4>

<div class="code"><pre>
PropertyConstraint(string name)
</pre></div>

<h4>Syntax</h4>

<div class="code"><pre>
Has.Property(string)...
</pre></div>

<h4>Examples of Use</h4>

<div class="code"><pre>
Assert.That(someObject, Has.Property("Version").EqualTo("2.0"));
Assert.That(collection, Has.Property("Count").GreaterThan(10));
</pre></div>

<h3>Special Properties</h3>

<p>Certain common properties are known to NUnit and 
may be tested using the following syntax...

<div class="code"><pre>
Has.Length...
Has.Count...
Has.Message...
Has.InnerException...
</pre></div>


</div>

<!-- Submenu -->
<div id="subnav">
<ul>
<li><a href="index.html">NUnit 2.5.10</a></li>
<ul>
<li><a href="getStarted.html">Getting&nbsp;Started</a></li>
<li><a href="assertions.html">Assertions</a></li>
<li><a href="constraintModel.html">Constraints</a></li>
<ul>
<li><a href="equalConstraint.html">Equal&nbsp;Constraint</a></li>
<li><a href="sameasConstraint.html">SameAs&nbsp;Constraint</a></li>
<li><a href="conditionConstraints.html">Condition&nbsp;Constraints</a></li>
<li><a href="comparisonConstraints.html">Comparison&nbsp;Constrants</a></li>
<li><a href="pathConstraints.html">Path&nbsp;Constraints</a></li>
<li><a href="typeConstraints.html">Type&nbsp;Constraints</a></li>
<li><a href="stringConstraints.html">String&nbsp;Constraints</a></li>
<li><a href="collectionConstraints.html">Collection&nbsp;Constraints</a></li>
<li id="current"><a href="propertyConstraint.html">Property&nbsp;Constraint</a></li>
<li><a href="throwsConstraint.html">Throws&nbsp;Constraint</a></li>
<li><a href="compoundConstraints.html">Compound&nbsp;Constraints</a></li>
<li><a href="delayedConstraint.html">Delayed&nbsp;Constraint</a></li>
<li><a href="listMapper.html">List&nbsp;Mapper</a></li>
<li><a href="reusableConstraint.html">Reusable&nbsp;Constraint</a></li>
</ul>
<li><a href="attributes.html">Attributes</a></li>
<li><a href="runningTests.html">Running&nbsp;Tests</a></li>
<li><a href="extensibility.html">Extensibility</a></li>
<li><a href="releaseNotes.html">Release&nbsp;Notes</a></li>
<li><a href="samples.html">Samples</a></li>
<li><a href="license.html">License</a></li>
</ul>
</ul>
</div>
<!-- End of Submenu -->


<!-- Standard Footer for NUnit.org -->
<div id="footer">
  Copyright &copy; 2010 Charlie Poole. All Rights Reserved.
</div>
<!-- End of Footer -->

</body>
</html>
